tronder

I don't know much about the Unifi but the edgerouter X is great for most homes the lite is faster and is basically over kill for most homes. (unless you have a 500/500+ connection)
I love mine it works flawlessly and has a lot of nice features.

building a pfsense box was the single best thing i did for my network, i recommend it

alternatively if you want to not have to tinker with pfsense you can install sophos home firewall XG, its free and not limited feature wise, the only downside to that is its limited to a 4c processor and 6gb of ram which imo is plenty for a home network

the reason why you would want a custom router as opposed to a consumer router is security and performance, pfsense and sophos firewall xg will offer much better network security than any off the shelf consumer router and have features like web caching so if you are on a limited data connection you dont have to redownload things like windows updates, ect., load balancing if you happen to have multiple wan connections, or you can even setup a LTE failover connection in case your main internet service has an outage

well its like spiking like on one core for like a second on temp sensor for real temp like once every 5-10 seconds 

Yeah I understand that and it is installed as per the instructions etc 
I'll try draining it tomorrow after work and I'll keep you guys up to date

i would go for the synology nas, DSM is great and has a lot more functionality then the netgear nas.

Hi there, i found this in the DS212j manual:
 

So you should be fine.
reds are the best priced Western Digital drives that i would use in a NAS, but personally i would use Seagate baracuda drives, they are cheaper and are just as good in my opinion.